Thanks for the feedback, I already tried this idea and compared with the results obtained from another simulation software. Actually the results from Matpower in this case are slightly deviated in terms of losses and voltages. I'm not sure if there is another way to get more accurate results. Thanks, Basem Idlbi Division Systems Engineering and Distribution Grids Fraunhofer Institute for Wind Energy and Energy System Technology, IWES Königstor 59 | 34119 Kassel / Germany Phone +49 561 7294-166 | Fax +49 561 7294-200 >>> Carlos E Murillo-Sanchez <[email protected]> 4/16/2013 3:21 >>> The standard branch model in matpower does not include the shunt conductance gc and susceptance bm that are normally used to model the iron loss current and magnetizing current, respectively, in a transformer. However, you could use a shunt conductance and a shunt susceptance (specified respectively in MW and in this case negative MVA at nominal V, type help idx_bus for details) at the corresponding "from" bus in the bus table to represent these. It would not be exactly like the standard "T" transformer model with the primary and secondary leakage reactances + winding resistances in the branches and the magnetizing and loss currents flowing down the center in the stem of the "T"; rather, the shunt elements would be right at the "1" port connections followed by the series r and x specified in the branch matrix. The shunt elements could actually be located also at the "to" bus instead; I guess that if the primary leakage reactance is higher than the secondary's I would put the shunt elements at the secondary's bus and viceversa.
carlos. Basem Idlbi wrote: Hi all, I'm trying to calculate the transformer losses including the iron losses. The available parameters are the resistance in [pu], reactance in [pu], no load losses in [W] and no load current in [%]. Do you know how to represent the transformer in Matpower for this case, and how to calculate the losses? Thanks in advance for any feedback, Basem Idlbi Division Systems Engineering and Distribution Grids Fraunhofer Institute for Wind Energy and Energy System Technology, IWES Königstor 59 | 34119 Kassel / Germany Phone +49 561 7294-166 | Fax +49 561 7294-200
